[proto] Optimized functional pad op for bboxes + tests

[vfdev-5]

Pad:

[------- pad_bounding_box cpu BoundingBoxFormat.XYXY --------] | pad_bounding_box_old v2 | pad_bounding_box v2 1 threads: --------------------------------------------------- (4,) | 80 | 10 6 threads: --------------------------------------------------- (4,) | 84 | 10 Times are in microseconds (us). [------- pad_bounding_box cpu BoundingBoxFormat.XYWH --------] | pad_bounding_box_old v2 | pad_bounding_box v2 1 threads: --------------------------------------------------- (4,) | 50 | 10 6 threads: --------------------------------------------------- (4,) | 50 | 10 Times are in microseconds (us). [------ pad_bounding_box cpu BoundingBoxFormat.CXCYWH -------] | pad_bounding_box_old v2 | pad_bounding_box v2 1 threads: --------------------------------------------------- (4,) | 50 | 10 6 threads: --------------------------------------------------- (4,) | 50 | 10 Times are in microseconds (us). [------- pad_bounding_box cuda BoundingBoxFormat.XYXY -------] | pad_bounding_box_old v2 | pad_bounding_box v2 1 threads: --------------------------------------------------- (4,) | 150 | 48 6 threads: --------------------------------------------------- (4,) | 147 | 48 Times are in microseconds (us). [------- pad_bounding_box cuda BoundingBoxFormat.XYWH -------] | pad_bounding_box_old v2 | pad_bounding_box v2 1 threads: --------------------------------------------------- (4,) | 91 | 47 6 threads: --------------------------------------------------- (4,) | 91 | 47 Times are in microseconds (us). [------ pad_bounding_box cuda BoundingBoxFormat.CXCYWH ------] | pad_bounding_box_old v2 | pad_bounding_box v2 1 threads: --------------------------------------------------- (4,) | 91.3 | 48 6 threads: --------------------------------------------------- (4,) | 92.5 | 47 Times are in microseconds (us). 

Crop (replaced clone+inplace with a single op):

[-------- crop_bounding_box cpu BoundingBoxFormat.XYXY --------] | crop_bounding_box_old v2 | crop_bounding_box v2 1 threads: ----------------------------------------------------- (4,) | 50 | 10 6 threads: ----------------------------------------------------- (4,) | 50 | 10 Times are in microseconds (us). [-------- crop_bounding_box cpu BoundingBoxFormat.XYWH --------] | crop_bounding_box_old v2 | crop_bounding_box v2 1 threads: ----------------------------------------------------- (4,) | 97 | 10 6 threads: ----------------------------------------------------- (4,) | 100 | 10 Times are in microseconds (us). [------- crop_bounding_box cpu BoundingBoxFormat.CXCYWH -------] | crop_bounding_box_old v2 | crop_bounding_box v2 1 threads: ----------------------------------------------------- (4,) | 100 | 10 6 threads: ----------------------------------------------------- (4,) | 100 | 10 Times are in microseconds (us). [------- crop_bounding_box cuda BoundingBoxFormat.XYXY --------] | crop_bounding_box_old v2 | crop_bounding_box v2 1 threads: ----------------------------------------------------- (4,) | 117 | 47 6 threads: ----------------------------------------------------- (4,) | 118 | 48 Times are in microseconds (us). [------- crop_bounding_box cuda BoundingBoxFormat.XYWH --------] | crop_bounding_box_old v2 | crop_bounding_box v2 1 threads: ----------------------------------------------------- (4,) | 195 | 47 6 threads: ----------------------------------------------------- (4,) | 196 | 47 Times are in microseconds (us). [------ crop_bounding_box cuda BoundingBoxFormat.CXCYWH -------] | crop_bounding_box_old v2 | crop_bounding_box v2 1 threads: ----------------------------------------------------- (4,) | 290 | 48 6 threads: ----------------------------------------------------- (4,) | 292 | 47 Times are in microseconds (us). 

cc @datumbox @bjuncek @pmeier

[datumbox]

LGTM, thanks!